Refrigerating apparatus



June l?, 3930. 5, KEILHOLTZ El' AL. 1,763,659 l REFRIGERATING APPARATUSOriginal Filed Oct. 25, 1923 2 Sheets-Sheet l .M X a y l @L 89 Y 93 i Z-vg ya W f x i i f8 I i /A 3/ ,2b z. Z i m June 17, 1930. s. KEILHQLTZTAL REFRIGERATING APPARATUS Original Filed Oct. 25, 1923 2 Sheets-Sheet2 Patented .lune 11, 1930 i vsiax-'rss'.

PATENT OFFICE LESTER S. KEILHOLTZ AND ERNEST DICKEY, 021? DAYTON, 01110,ASSIGNORS, BY MESNE ASSIGNMENTSpTO FRIGIDAIRE CCRPORATION, ACORPORATION. OF DELAWARE REFRIGERAATING- APPARATUS Application filedOctober 23, 1923, Serial No. 670,352. Renewed lMarch 24, 1928.

This invention relates to improvements in refrigerator cabinetconstruction, and provides various new and useful features relatingtothe construction of an easily cleaned l! air tight inner liningtherefor.

One object of the invention is to so locatev the drain pipe that it doesnot pass through any food compartment and yet extends verticallydownward from the compartment to `m be drained thereby.

Another object is to provide -an improved construction of-securing themetal lining to the door post whereby' the" side'surface of the foodcompartment will lie substantially flush u with the door way, therebypermitting the to the accompanying drawings, wherein apreferred form ofem iodiment of the present invention is clearly shown.

In the drawings:

Fig. 1 is a vertical section through a refrigerator, taken online 1-1on'Fig. 2, and shows certain features of this invention.

Fig. 2 is a horizontal section taken on line 2 2 of Fig. 1, andillustrates the location of the drain pipe and the straight side liningflush with the ,door way.

Fig. 3 is a vertical section taken on line 3--3 of Fig. 2.

Figs. 4 and 5 are enlarged detail views showing modified forms oftheflue opening in the l'vertical partition. f

Fig. 6 is a partial front elevation of the rerigerator, showing thearrangement of the doors and means for locking the two food compartmentdoors.

Fig. 7 is an enlarged View ofthe shelf support, partly in section tomore clearly show the construction.

Fig. 8 is a view on a reduced scale showing the construction of the wooddoor panel before the veneering is applied.

Fig. 9 shows a section through the Ywood dilior panel after the veneernghas been apied.

p In the drawings, similar reference characters refer to similar partsthroughout the several views.

Numeral U10 designates the outer wooden casing of the refrigeratorcabinet which may be of any desired construction. Ordinarily this casingis built up around four corner posts 11 and thick heat insulating walls12 of any suitable construction are secured in place to these posts 11,leaving an air space 13 be- 'loo tween the walls 12 and the casing 10.In the refrigerator illustrated in the drawings, the

interior space or compartment of the cabinet is divided up into a heatabsorbing or cooling chamber 15 at the upper left hand corner and anL-shaped food chamber 16 extending be- .low and along one side ofchamber 15. The

horizontal partition 17 and vertical partition 18 separating chambers 15and 16 are also heat insulating walls in order that a lower temperaturemay bemaintainedin chamber l5 than in chamber 16. The flue openings 20and 21 in the horizontal and vertical partitions respectively providefor the circulation of the cold air around through chambers 15` and 16in a manner well known in the art. Both ofthe chambers 15 and 16 havethe interior surface of their walls lined throughout with a metal liningstructure including a metal lining portion 25 and the metal liningportion in order to make these'chambers practically germproof, easilycleaned, and air tight to protect the interior of the refrigerator fromany odors or vapors from .the insulating walls of wood work.

At the fine opening 20 in the horizontal partition 17 the lining 25 atboth upper and lower surfacesis provided with an integral upwardlyextending flange, the upper Bange 26 extending around the edge of theopening in the wall and the lower Harige 27 extending upwardly withinsaid openlng as clearly ing material, such as hydrolene, applied betweenthe two linings 25.

At the flue opening 21 in the vertical partition 18 the metal lining 25on both sides of the Wall is cut away substantially flush with theopening. The coupling ring 35 fits snugly within the opening 21 and isprovided with integral flanges which are turned outwardly around thebordering edges of the linings 25,

as clearly shown in Fig. 1.

In the modified construction shown in Fig. 4 the metal lining 25 isprovided with an integral outwardly turned flange 37 around each side ofthe flue opening and the flanges of coupling ring are bent around theseflanges 37 as clearly illustrated.

In the modified construction shown in Fig, 5 the metal linings 25 arecut away substantially flush with the opening and the coupling ringconsists of two telescoping parts 40 and 41 which lit'snugly within theopenings in the lining 25 and telescope snugly upon one 'another untilthe outwardly turned flanges 42 abut the linings 25.

The front side of chamber 15 is closed by the heat insulating door 45and the front side of chamber 16 by the lower door 46 and the large door47. The wooden door jamb 48 lies between the large door 47 and the twosmall doors 45 and 46. The narrow section of insulating wall applied tothe inner side of the door jamb 48 between doors 46 and 47 is made inthe form of a U-shaped post 50 of sheet metal forming a portion of themetal lining structure of the compartment of the refrigerator, whichpost also serves to brace and support one corner of the partition walls17 and 18 (see Fig. 3). The inturned flanges 51 of the post 50 areclamped against the door Jamb 48 by means of small metal clamps 52 nearythe top and bottom of the post 50. Preferabl cork sealing gaskets areplaced between the anges 51 and door jamb 48 and heat insulating pads ofcork between the clamps 52 and the flanges 51. After the post 50 is thussecured in place the joints at the flanges may be thoroughly sealed upfrom inside the post by some suitable material, such as 'hydro1ene,which is illustrated in Figs. 2 and a heavy shading. An importantfeature -of this invention is the location of the drain pipe 55interiorly of the post 50, as most clearly shown in Fig. 3, whereby saiddrain pipe leads vertically. downward from the-floor of the chamber l5and yet' does not pass through any part of the food chamber 16.

Obviously this construction permits acleaner and more air-tight foodchamber. The drain pipe 55 need be sealed only where it connects withthe floor lining of the chamber 15. Preferably the post 50 after beingsecured in place as above described, is filled with some suitable heatinsulating material, such as ground cork, and thus aids in insulatingthe chamber 16 from the outside temperature.

Fig. 2 illustrates another feature of this invention whereby a straightside lining substantially flush with the door way is obtained. Thecorners lof the cabinet along which thc doors are hinged are reinforcedby thedoor posts which lie substantially flush with the side insulatingwalls 12.v The inner linings 25 of the side walls are provided withoutwardly turned integral flanges 61 which abut the door posts 60 andare clamped thereto by small metal clamps 62, which are similar to theclamps 52 above described. Preferably cork gaskets 63 are placed betweenflanges 61 and door posts 60 and also small cork pads between the clamps62 and the flanges 6l. The joints between the lining 25 and posts 60 arealso preferably sealed by suitable sealing material applied from theoutside of lining 25. By this construction an absolutely air-tight sealis obtained between lining 25 and door post 60, and with the largeadvantage of having the lining 25 straight and flush with the door way.The post 50 forms part of the lining structure of the food colnpartment.This portion of the lining is recessed to receive a conduit such as adrain conduit. Thus a lining is provided for a food compartment having arecess to receive a conduit or drain pipe.

The supports for the removable shelves will now be described. Thesesupports 7() arc Jrovided with a screw threaded end portion 1 of reduceddiameter which extends through a small hole in the lining 25. The nut 72and washer 73 are applied from the outside and by this means theshoulder 74 is drawn tightly up against the lining 25 thus giving anair-tight connection. The insulating material of the side. walls isapplied after the supports 70 are secured in place, the projecting nut72 and threaded portion 71 being imbedded in the insulating material, asclearlyr shown in Fig. 7.

All the features of this invention described above relate to an easilycleaned air-tight cabinet. Obviously it is highly advantageous to havethe inner compartments of a refrigcrator substantially hermeticallysealed from the insulating material in the walls thereof. since theopening and closing of the doors will cause the circulation of airthrough very small cracks or apertures in the metal lining and thusbring the otl'ensivc odors of the insulating material into the foodcompartments. Any small crcvices 1n the linmg also are hard to keepclean and so serve as breeding places for germs. This invention isintended to overcome these defects and disadvantages ordinarily presentin refrigerator cabinets. inner metal lining be of non-corrosive metalor porcelain covered. A mechanical refrigerator has been illustrated inthe drawings, but obviously the principles of this invention can beequally as Well applied to an ice refrigerator. In the refrigeratorillustrated, the cooling is accomplished by a header 89 which is placedin a tank'90 containing brine solution. The brine tank is suspended bystraps 91 from bolts 92 placed in the top of the cabinet. Refrigerantmedium is supplied to the header 89 by any suitable compressor (notshown) through conduit 93, and is withdrawn therefrom by the samecompressor' through conduit 94. This structure is all conventional andis not involved in any of the inventive features herein described.

The construction of the doors 45,46 and 47 will now be described. Thewooden door panel comprises a plurality of vertically extending members7 5 which have tongue and groove connection, as clearly 'shown in Figs.8 and 9, and two transverse members 76 eX- tending across the ends ofmembers and having mitered corners with the two outside members 75. Theconstruction thus formed is then overlaid on both sides with veneering77, thus obtaining a very substantial, warp proof, and neat appearingdoor panel. A rabbet 78 is cut out around the inner edge of the panel toprovide a sealing shoulder for the door. A cork sealing gasket 80 isattached to the sealing face of the rabbet 78 extending all around thedoor to give a substantially air-tight seal When the door is closed.

In addition to the usual door latches the two food compartment doors 46and 47 are provided with a locking means wherebyV both doors may belocked by a single locking means. In the form shown, a hasp 86 longenough to project over both doors 46 and 47 is inserted over thestaple87 and the padlock 88 locks the hasp in place. When it i-snot desired tolock the doors the hasp and padlock may be entirely removed and hencewill not interfere in any way with the ordinary operation of the doors.I n

While the form of embodiment of the invention as herein disclosed,constitutes a preferred form, it is to be understood that otherformsmight be adopted, all coming within the Scope of the' claims whichfollow.

What is claimed is as follows:

In combination, aKV refrigerator cabinet havingacooling compartment anda food Of course it is intended that the.

passing lengthwise through said heat-insulating means.

2. In combination, a refrigerator cabinet having a cooling compartmentand a food compartment, a door post in said cabinet, said door postbeing provided with a U-shaped member attached to said door post so asto leave a space between the post and the U- shaped member, a drain pipefor said cooling compartment passing through said space, and heatinsulating material surrounding said pipe and filling said space.

3. In a. refrigerator, a heat insulating wall having a metal liningadjacent its inner surface, a shelf support secured to said lining, saidsupport having an integral portion eX- tending through an opening insaid lining, and fastening means secured to said extending portion, saidextending portion and fastening means being imbedded in said insulatingwall.

4. A refrigerator cabinet including a metal lining structure forming acompartment, insulation for said cabinet, a recess in said liningstructure outside of said compartment, and a conduit along saidrecessextending into said compartment.

5. A refrigerator cabinet including a metal lining structure forming acompartment, insulation for said cabinet, a recess in said liningstructure outside of said compartment extending inwardly into saidcompartment, and

a conduit along said recess extending into said compartment.

6. A refrigerator cabinet comprising a metal lining structure 'forming acompartment, insulation for said cabinet, a cooling chamber in saidcompartment, a recess in said ico lining structure, and a drain pipe insaid rel cess for said cooling chamber.

7. 'A refrigerator cabinet comprising a metal lining structure forming a.compartment, insulation for said cabinet, a cooling chamber in saidcompartment, a recess in said lining structure outside said compartment,and a drain pipe in said recess for said cooling chamber. v

partment lined with a metal lining structure, part of said metal liningstructure having a recess on its outer side, insulation on the outerside of said metal lining structure, and a pipe leading into saidcompartment and extending along the recess of said metal liningstructure. V

In testimony 4whereof We hereto aiiix our signatures LESTER S.KEILHOLTZ. ERNEST y DICKEY.

compartment, a plurality of doors, one for each of said compartments, apost interposed between said'doors, said post being provided withheat-insulating means, and a drain pipe for said cooling compartment,said drain pipe 8`. A refrigerator cabinet having a com-

